Pass traverse session

java/src/com/android/inputmethod/latin/BinaryDictionary.java

...src/com/android/inputmethod/latin/DicTraverseSession.java

...ve/jni/com_android_inputmethod_latin_BinaryDictionary.cpp

.../jni/com_android_inputmethod_latin_DicTraverseSession.cpp

...ve/jni/com_android_inputmethod_latin_DicTraverseSession.h

native/jni/src/dictionary.cpp

native/jni/src/dictionary.h

native/jni/src/gesture/gesture_decoder_wrapper.h

native/jni/src/gesture/incremental_decoder_interface.h

native/jni/src/gesture/incremental_decoder_wrapper.h